Table 1.

Summary of some cellulose derivatives and their corresponding hydrogel processing methods (copied from Reference [58]).

Cellulose and Cellulose Derivatives	Nature of Solvent	Solvent Systems	Corresponding Hydrogel Preparation Methods
Cellulose form wood	Polar solvents	NMMO	Solution polymerization at 85 °C
Cellulose from cotton pulp	Polar solvents	LiCl/DMAc	Solution polymerization at 75–90 °C
Filter paper	Ionic solvents	[Amim]Cl	Solution polymerization at 70 °C, 2 h
Tunicate cellulose	Alkali aqueous	Alkali/urea	Polymerization at −12 to −10 °C, 5–10 min
Cotton linter	systems	Alkali/thiourea	Polymerization at −5 °C, 2–10 min
Carboxymethylcellulose	Alkali aqueous	H2O	Solution polymerization, in situ polymerization
(CMC)	systems	DCM/DMSO	Solution polymerization, in situ polymerization
Methyl cellulose (MC)	Polar solvents	H2O	Solution polymerization, cryogenic treatment
Hydroxyethyl cellulose (HEC)	Polar solvents	H2O/ethanol	Solution polymerization, inverse-phase suspension polymerization
Hydroxypropyl methyl cellulose	Polar solvents	Acetone/ H2O	Chemical crosslinking

NMMO, N-methylmorpholine-N-oxide; LiCl/DMAc, lithium chloride/dimethylacetamide; [Amim]Cl, 1-allyl-3-methylimidazolium chloride; H₂O, water; DCM/DMSO, dichloromethane/dimethyl sulfoxide.